package com.szq.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.szq.common.CustomException;
import com.szq.dto.DishDto;
import com.szq.entity.Dish;
import com.szq.entity.DishFlavor;
import com.szq.service.DishFlavorService;
import com.szq.service.DishService;
import com.szq.mapper.DishMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

/**
* @author 吾空白
* @description 针对表【dish(菜品管理)】的数据库操作Service实现
* @createDate 2023-04-10 15:13:57
*/
@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish>
    implements DishService{


    @Autowired
    private DishFlavorService dishFlavorService;
    /**
     * 新增菜品,同时保存对应的口味数据
     * @param dishDto
     */
    @Override
    @Transactional
    public void savesWithFlavor(DishDto dishDto) {
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);

        Long disId = dishDto.getId();//菜品id

        //保存菜品口味数据到菜品口味表dish_flavor
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors=flavors.stream().map((item)->{
            item.setDishId(disId);
            return item;
        }).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);


    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @Override
    public DishDto getByIdWithFlavor(Long id) {
        //查询菜品基本信息，从dish表查询
        Dish dish = this.getById(id);

        //对象拷贝
        DishDto dishDto=new DishDto();
        BeanUtils.copyProperties(dish,dishDto);

        //查询当前菜品对应的口味信息
        LambdaQueryWrapper<DishFlavor> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);

        return dishDto;
    }

    @Override
    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
      //更新dish表基本信息
        this.updateById(dishDto);

        //清理当前菜品对应口味数据--dish_flavor的delete的操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());
        dishFlavorService.remove(queryWrapper);

        //添加当前提交过来的口味数据---dish_flavor表insert操作
        List<DishFlavor> flavors=dishDto.getFlavors();
        flavors=flavors.stream().map((item)->{
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);
    }

    @Override
    @Transactional
    public void deleteDishWithFlavor(List<Long> ids) {
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.in(Dish::getId,ids);
        queryWrapper.eq(Dish::getStatus,1);
        int count = (int)this.count(queryWrapper);

        if (count>0){
            throw new CustomException("菜品正在售卖中，不能删除");
        }
        this.removeByIds(ids);
        LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.in(DishFlavor::getDishId, ids);
        dishFlavorService.remove(lambdaQueryWrapper);
    }

}




